[EN]: One of humanity’s greatest achievement in the 20th century turns 45 years old today: the Moon landing of Apollo 11.

American astronaut Neil Armstrong walked on the moon on the night of July 20, 1969, followed by Buzz Aldrin. They spent almost 22 hours on the moon, and returned later there for other missions. Unfortunately, astronauts have not returned to the moon since 1972.

Tomorrow, NASA will remember Armstrong by renaming the Operations and Checkout Building in Cape Canaveral, FL at 10:25 am ET.

Whether or not you are old enough to remember this moment, it’s an occasion that should never be forgotten. If you’ve never seen “one small step for man, one giant leap for mankind,” it’s worth watching this video again and again.

To relive this historic moment, watch the CBS broadcast of the Lunar landing here. In case you want to see Armstrong walking on the moon, forward the video to the 22nd minute.